Gearing unit for time-trains.



E. H. HORN.

(BEARING UNIT FOR Tl-ME TRAINS. APPLICATION FILED DEC-3. 1911.

1 ,271,318. I Patented July 2,1918.

the said end of the pinion 6 by means of a UNITED STATES ATE ToFFIoE.

ERNEST H. HORN, or wAirERBUR CONNECTICUT, Assienoa T0 wATEnBURvcLocK 00., OF WATERBURY, CONNECTICUT, A CORPORATION;

' GEARING UNIT FOR TIME-TRAINS.

1 7 ,31 Specification of Letters Patent.

Application fiia DecemberB, 19 1 serial No. 205,142.

To-aZZ whom it mayconcern:

Be it known thatI', ERNEsT H. Honmfa citizen of the United States, residing at lVaterbury, in the county of New Haven and State of Connecticut, have invented a new. and useful Improvement in Gearing Units 1 for Time-Trains; and I do hereby declare the following, when taken in connection with the accompanying drawings and the characters of reference marked thereon,,to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in

Figure 1 a view in elevation of a timetrain gearing unit constructed in accordance with my invention.

Fig. 2 a view thereof on the line 22 of upon the stafflOQ In the construction shown by Fig. 4 of the drawings, the gear wheel 3 is frictioually driven upon the staff 16 and clamped between two special clamping-collets 17 and 18 also driven friction-tight upon the staff which in this case is furnished with a lantern pinion 19 corresponding to the 1 lan tern pinion of Fig. 3 but separated from the gear wheel 3. 7

three methods shown and described of mounting the gear-wheel, the same is mainly held against rotation by surface friction upon its opposite faces. On account of the thinness of the stock in these wheels, the

' Patented July2,*191 8. I

. special clamping=colletl5 frictionallydriven It will be observed that in each of the.

Fig. l. amount of friction produced by the engage- Fig. 3 a sectional View of a modified form ment of themetal of the wheel, with the thereof. staff itself, is small. My improved construction provides a'cheap and effective substitute for the common way of mounting the gear-wheels of the gearing units of the trains of clocks and watches, the common way be ing to provide the wheel with a relatively large, concentric hole adapting it to fit over a shoulder formed upon the adjacent end of the pinion and upset or staked to hold the wheel in place after the mounted upon it.

I claim 1. As a new article of manufacture, a gearing unit for time-trains, the said unit consisting of a staff mounting a pinion, a wheel frictionally driven upon the staff, and a clamping-collet driven upon the staff in po sition to have surface engagement with one face of the wheel which it clamps against another point of surface-engagement, where by the wheel isheld against rotation upon the staff by friction upon its opposite faces Fig. at a sectional view of another modified form thereof.

My invention relates to an improved gearing unit for time-trains, the object being to reduce the expense of producing such parts.

With these ends in view, my invention consists in a time-train gearing unit having certain details of construction as will be hereinafter described and pointed out in the claims. d r

In carrying out my invention, as shown in Figs. 1 and 2, the gear wheel 3 is formed with a central opening 4 adapting it to be frictionally driven directly upon the pinion staff 5 so as to abut against the adjacent end of a cut pinion 6, so called because its leaves are produced by cutting an integral enlargement of the staff whichas shown is formed at its ends with integral trunnions 7 and 8. The said wheel is'held against special clamping-collet 9 also .frictionally driven upon the stafl. 5 and bearing upon the adjacent face of the wheel which is thus frictionally clamped between'the said collet and pinion in addition to being driven upon the stafl 5, whereby it is firmly held in place.

In the construction shown by Fig. 3, the gear wheel 3 is frictionally driven upon the staff 10 against the adjacent face of the thick collet 11 of an ordinary lantern pinion also comprising pins 12, a thin collet 13, and a washer 14, which latter holds the pins against endwise displacement. The wheel 3 is held against the collet 11' by means of a of the gearing-unit structure.

wheel has been produced by the driving of the collet which of the said pinion, and a special clampingcollet frictionally driven upon the staff forpinching the Wheel between it and one end ofrthe said cut-pinion, whereby the. Wheel is held against rotation with respect to the staff 10 by friction upon its oppoeite faces produced specification 1n the presence of two subscribingiwitnesses.

ERNEST I1. HORN. Witnesses;

v Kyrgnnmn E. MARSHALL, GnoRenDQALLEN.

Copies of this patent may be obtained for fiye cent; each, by a ddregisi g the cgnnnfig' iqner oji-Patents;

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